Because I keep forgetting this...

datetime_to_epoch.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
    datetime_to_epoch
    ~~~~~~~~~~~~~~~~~

    Takes a (naive) UTC datetime and converts to epoch
"""

from calendar import timegm


def to_epoch(dt):
    """Returns the UTC epoch given a datetime
    """
    return timegm(dt.utctimetuple())


if __name__ == '__main__':
    import sys
    from dateutil.parser import parse

    if len(sys.argv) > 1:
        for date in sys.argv[1:]:
            print to_epoch(parse(date))